1198217 has 2 divisors, whose sum is σ = 1198218. Its totient is φ = 1198216.

The previous prime is 1198201. The next prime is 1198229. The reversal of 1198217 is 7128911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674041 + 524176 = 821^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198217 - 2⁴ = 1198201 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 1198217.

It is not a weakly prime, because it can be changed into another prime (1198247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599108 + 599109.

It is an arithmetic number, because the mean of its divisors is an integer number (599109).

2^1198217 is an apocalyptic number.

It is an amenable number.

1198217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198217 is an equidigital number, since it uses as much as digits as its factorization.

1198217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 29.

The square root of 1198217 is about 1094.6309880503. The cubic root of 1198217 is about 106.2131997122.

The spelling of 1198217 in words is "one million, one hundred ninety-eight thousand, two hundred seventeen".